Improvement in clocks and watches



J. A. MILLER. Clocks and Watches.

No. 220,724. Patented Oct. 21, I879.

U H WWW jaw/M271: d, QW

UNITED STATES PATENT OFFICE.

JOHN A. MILLER, OF PADUOAH, KENTUCKY.

IMPROVEMENT IN CLOCKS AND WATCHES.

Specification forming part of Letters Patent No. 220,724, dated October 21, 1879; application filed June 26, 1879.

To all whom it may concern:

Be it known that I, J OHN A. MILLER, of the city of Padueah, in the county of McOracken and State of Kentucky, have made certain Improvements in Clocks and Y'Vatches, of which the following is a specification.

All time-keepers are subject to be deranged or obstructed, or even stopped in their movements, hence the time is lost; and to avoid liability of such difficulty, and to have such a construction and arrangement of the moving parts as to completely overcome such defect, is the object of this invention.

The invention consists in the construction and arrangement of the moving parts of timekeepers so that the time will always be kept, as will be fully hereinafter described.

In the drawings, Figure 1 represents a front view of the invention in a clock. Fig. 2 is a side view of the same.

A and A represent two clock-movements in one framing, a, of the usual form of construction, each having the usual trains of wheels, actuated by a coiled spring, and means of regulating the movements of the trains as is usual in clocks or watches.

B and B are the driving-wheels in the movement, respectively, on winding-shafts C and 0, wheel B gearing into pinion c, that is fast on the hour-hand shaft D. Vheel B gears into pinion c, that is fast on the minute-hand shaft D.

cl is a pinion on shaft D, and d is alike pinion attached to sleeve-shaft I), that may freely revolve around, shaft D, or with it, as circumstances may control.

Gr is a spur-gear transfer-wheel, fast on shaft G, which gears into pinion d on shaft D and pinion d on sleeve D, around shaft D, and is an intermediate gear between sleeve-shafts E and D, and transfers motion from train A to the minute-hand on sleeve D.

H is the hour-hand, and is driven in the usual manner. H is a minute-hand, firmly attached to and revolving with shaft D 5 and H is another minute-hand, attached toand revolving with sleeve-shaft D. With this construction and arrangement of two trains of time-movements, properly adjusted and regu- .lated to indicate the same time, the two minute-hands H and H will be coincident and appear as but one; but if one of the movements should stop or be damaged, the minutehand connected with that train would either stop or slow its movement, and the discrepancy would be seen at once. Consequently by connecting two trains of time-movements in the manner above described the loss of time is remedied or prevented, as either one of the movements would keep the time if the other should stop.

This invention can be applied to watches as well as clocks, the principle being the same, and be applied to clocks where a weight is used instead of a spring, or to a pendulum or other regulating device.

I am aware that two time-movements have been applied to certain devices in clocks for the purpose of avoiding a disaster it but one were employed and that should stop but I am not aware that two such movements are in use in a watch or clock to indicate time through minute or hour hands.

What 1 claim, and desire to secure by Let; ters Patent, is

1. In a clock or watch, the combination of two independent time train-movements with twoindependentminute-handsrevolvinground a common center, substantially as described.

2. The combination of the two t ains A and A of time-movements with the intermediate transfer spur-wheel G, pinion d, shaft I), sleeve D, and two minute-hands, H and H, as and for the purposes described.

3. In a time-indicator, such as a clock or watch, the combination of two time-movements, A and A, intermediate transfer spur-wheel G, shafts D and D, sleeves D and E, hour-hand H, and minute-hands H and H, with their intermediate gear connections, as and for the purposes described.

JNO. A. MILLER.

WVitnesses:

W. I. HOLLOWAY, J12,

S. J'. HINTON. 

